I have shot about 2500 rds of 150gr Hornady FMJBT's using 46 grains of H4895. This is an accurate and reliable load for my M1. It is probably a little lighter than standard M2 ball (the M1's issue ammo) but I have had good results with that combo and have rung steel out to 1000 with it.

I loaded 47gr of 4895 behind 150gr Hornady FMJBT but havent had a chance to try them yet. I just ordered some Hornady match 168gr HPBT but havent decided how Im going to load them yet. Probably somewhere around 47gr as well.

I just shot 3 John C Garand matches in 3 days in Arizona. On my rapid fire prone stages i scored a 96-4x, 98-5x and 97-3x. That is out of 100 points and at 200 yards, using an as issued Garand. I can tell you 46.5 gr of IMR 4895 under 150gr Hornady FMJ-BT bulk bullets work. Proof is in the pudding.

If you want to know Hornadys previously elusive 168gr A-Max recipe that costs 25.00 a box, its 46.5 gr of Varget.

Here is quote I found on the CMP forums after lots of searching. A guy from Hornady.

"Our nominal load is 46.5 gr of Varget. We had one lot in 2009 that we had to load with RL-15 because we had no Varget at the time and had to make a delivery. The RL-15 was the black and higher charge weight powder that some guys have reported. Varget is less temperature sensitive than the RL-15. I can say from experience this load shoots very well at 600. If you can find N135 it is absolutely the best powder going in the Garand with a 168. 46.3 grs. In my tests it will out shoot the Varget a little at 600."